Internal-combustion engine.



J. HILL.

INTERNAL COMBUSTION ENGINE.

APPLICATION FILED AUGJO. I917.

Patented May14,'1918.

2 SHEETS-SHEET I.

J. HILL.

.. INTERNAL COMBUSTION ENGINE.

APPLICATION men A us.|o.'19n.

1,265,913; Patented May 14,1918.

{SHEETS-SHEET 2.

. ,7 UNITED STATES" PATENT OFFICE- JOSEPH HILL, or TORONTO, ONTARIO,CANADA.

INTERNAL-COMBUSTIONENGINE.

To all whom it may concern:

Be it known that I, JOSEPH HILL, a subject of the King of Great Britain,residing in the city of Toronto, county of York, Province of Ontario,Canada, have invented certain new and useful Improvements inInternal-Combustion Engines, of which the followingis specification.

Myinvention relates to improvements in internal combustion engines, andmore particularly to that class of engines, known as a double-actingcylinder type, andthe objects of my invention are, first, to provide acombustion chamber common to each end of two or more cylinders in whichit is only necessary to mount one igniting means for the said cylinders,and secondly to provide means whereby the amount of power developed bythe engine can be altered at will without having to stop the engine.

"In the following specification, and in the drawings forming partthereof, I show the 'preferredconstruction for the embodiment theseparts may be provided of my invention, thoughthe cylinders andcombustion chambers are merely conventional. While I prefer to make mycylinders air-cooled, it will be understood that with waterjackets ifdesired. r

Figure 1 is 'an elevation of the major portion of a pair of cylinders,with the valves.

et cetera, showing a vertical'longitudinal section through one of thecombustion chambers. Fig. 2'is a vertical cross section on the line 22,Fig. '1, certain parts being shown in elevation. Fig. 3 is a view of acertain operating element hereinafter referred to, and Fig. A is anelevation of the left-hand side of Fig. 2,'showing the pair of cylinderscarried by a suitable mounting.

In the drawings, like characters-of reference refer to the same parts.

A are a pair of suitable cylinders suitably associated, and operatingwithin each of these cylinders is a double-headed piston B. Thesepistons are suitably coupled together and to a connecting rod a, by thewrist-pin C, (Fig. 2). Supported at each end of each of the saidcylinders is an offset combustion chamber D. These combustion chambershave communication with the cylinders A by means of the ports E. Formedin the lower portion of each combustion chamber D, and separatedtherefrom by a' longitudinal wall F, are a plurality of chambers G whichare separated from each Specification of Letters Patent. 7 Patentedlylay 14, 1918 Application filed. August 10, 1917. Serial No. 185, &48.1

' other'by walls H. I are intake valves conber G, and the combustionchamber D. M

is the usual cam-shaft j ourna'led in suitable bearings N, and thiscam-shaft 1s provided with cams O suitably positioned so that the.

valves I and K, in each of the combustion chambers D will be timed tooperatein proper sequence. The explosive mixture may be conveyed fromthe carburetor (not shown), by any suitable means. ferred meanscomprises the manifold P, the

branches of which leadto the chambers G exit from which is controlled bythe valves I. Mounted in each combustion chamber D is any suitableigniting means for theexplosive mixture. For purposes of illustration,

I show an electric igniter 2. These electric igniters will ignitethecharge in the explosive chambers D, so as to-develop power within thecylinders A, at the required ends,

and I am therefore enabled to dispense with a number of igniters nownecessarily employed.

It will of course be understood that the pair of pistons B functionatetogether, and by having the common combustion chamber, I insure thateach cylinder A receives its proper proportion of explosive mixture.

Another advantage derived from my invention-is that igniter troubles aregreatly. reduced.-

3 is-the exhaust port opening from the central auxiliary exhaust chamberG.

'In case I should desire to develop power in only one end of thecylinders'A, I will;

make use of means tohold one of the exmounted to move longitudinally insuitable brackets 5 carried by a plate 6 suitably carried by saidcylinders A. J ournaled between the ears 7, carried by the plate 6, bythe pin 8, is a bell-crank lever 9, one arm 10 of which is in contactwith the lower end of the stem 11, of the valve K. The other arm 12 ofsaid bell-crank lever is positioned between the rod A and the plate 6.To hold the upper valve K, for instance, open, the rod l is pushed inthe direction indicated by arrow in Fig. 1, and by reason of the camface13 carried thereby, the arm 12 will move toward the plate 6, thuspermitting the forms, and I desire not to be restricted be-' to be thebest embodiments of my invention,

still I desire it to be understood that the principle may be embodied inmany difierent yond the terms of my claims and requirements of the priorart.

Claims:

. 1. The combination with a pair of double acting cylinders, adouble-headed piston mounted in each of the said cylinders, and

means whereby said pistons are connected together of a combustionchamber at each end of the said cylinders, provided with ports openinginto said cylinders; a portprovided wall extending longitudinally ofsaid combustion chamber; two vertical walls connecting said longitudinalwall with the lower wall of said combustion chamber thus forming threealined port-provided chambers beneath said longitudinal wall; the twoouter chambers receiving the fresh charges and theintermediate chamberreceiving the exhaust; a puppet valve operating through each of the saidchambers and controlling the ports in said longitudinal wall; means foroperating said valves, and unitary igniting means for said combustionchamber.

2. The combination of a pair of doubleacting cylinders, a double headedpiston mounted in each of the said cylinders, means whereby said pistonsare connected together; a combustion chamber at each end of the saidcylinders provided with ports opening into said cylinders; and eachfurther provided with two intake'and one exhaust portprovided chambersseparated therefrom by a wall; intake valves for said intake chambers;means for operating same; an exhaust valve for said exhaust chamber; andmeans brought into contact with the stem of one of said exhaust valveswhereby the said valve can be held open for the purpose specified.

3. The combinationof 'a pair of doubleacting cylinders, a double-headedpiston mounted in each of the said cylinders, means whereby said pistonsare connected together; a combustion chamber at each end of the saidcylinders provided with ports opening into said cylinders; and eachfurther provided with two intake and one exhaust portprovided chambersseparated therefrom by a wall; intake valves for said intake chambers;means for operating same, an exhaust valve for said exhaust chamber; andmeans brought into contact with the stem of one of said exhaust valveswhereby the said valve can be held open for the purpose specified,comprising a bell-crank lever, one arm of which projects underneath thestem of one of said exhaust valves; means whereby said bell-crank leveris pivoted in place, and a push-rod provided with a cam-surface, carriedby said plate and in such position as to operate against said bell-cranklever to hold the designated exhaust valve open.

45. The combination of a pair of doubleacting cylinders and a combustionchamber at each end thereof and offset therefrom and provided with portsopening thereinto; a wall extending longitudinally. of said combustionchambers and provided with three alined ports; a vertical wallpositioned between each two of the said alined ports and connecting saidlongitudinal wall with the.

fresh charges, and the intermediate one re-r ceiving the exhaust.

JOSEPH HILL. Witness:

GEORGE A. BARBIE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

